# Vitest v0.31.0 — Release & Upgrade Intelligence
- **Product:** Vitest (https://vitest.dev)
- **Version:** v0.31.0
- **Released:** May 03, 2023
- **Impact Score:** 7/10
- **Breaking Changes:** Source flagged
- **Canonical Analysis:** https://changelogs.us/vitest/updates/v0.31.0/
## Executive Summary (TL;DR)
Vitest v0.31.0. Source highlight: 🚨 Breaking Changes
## Breaking Changes & Deprecations
- 🚨 Breaking Changes - Remove `browser` from allowed pools inside `poolMatchGlob` config option. Please, use Vitest workspaces for running tests in the browser.
## New Features
- Update mock implementation to support ESM runtime, introduce "vi.hoisted" - by @sheremet-va in https://github.com/vitest-dev/vitest/issues/3258 (0c09a)
- Bypass ESM import order restriction with `vi.hoisted` to run code before imports are executed:
- Add repeat method to tests - by @samkevin1 in https://github.com/vitest-dev/vitest/issues/2652 (7c8f0)
- Add an option to hide skipped test lines - by @g4rry420 and @sheremet-va in https://github.com/vitest-dev/vitest/issues/2745 (9bdb1)
- **coverage**: Watermarks for c8 - by @AriPerkkio in https://github.com/vitest-dev/vitest/issues/3254 (730af)
- **ui**: Add html coverage - by @userquin and @sheremet-va in https://github.com/vitest-dev/vitest/issues/3071 (e24cd)
## Bug Fixes
- Don't call global setup teardown twice - by @sheremet-va in https://github.com/vitest-dev/vitest/issues/3188 (ba3d1)
- Reporter to log version before provider initalizations - by @AriPerkkio in https://github.com/vitest-dev/vitest/issues/3131 (481b1)
- Throw an error if Vitest cannot access its internal state - by @sheremet-va in https://github.com/vitest-dev/vitest/issues/3250 (fbb14)
- Warning suppression broken - by @IceQub3 in https://github.com/vitest-dev/vitest/issues/3270 and https://github.com/vitest-dev/vitest/issues/3271 (036de)
- Show correct diff in "toHaveBeenCalledWith" - by @sheremet-va in https://github.com/vitest-dev/vitest/issues/3289 (19fcd)
- Don't print esm warning, if package name is not found - by @sheremet-va in https://github.com/vitest-dev/vitest/issues/3292 (62c14)